package com.skycong.hello77.activity.common;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Rect;
import android.util.AttributeSet;
import android.view.View;

/**
 * Created by Kiki on 2018/5/28.
 */

public class CounterView extends View implements View.OnClickListener {

    private Paint mPaint;
    private Rect mBounds;
    private int mCount;

    public CounterView(Context context,AttributeSet attrs) {
        super(context, attrs);
        mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
        mBounds = new Rect();
        setOnClickListener(this);

    }
    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        mPaint.setColor(Color.BLUE);
        canvas.drawRect(0,0,getWidth(),getHeight(),mPaint);
        mPaint.setColor(Color.YELLOW);
        mPaint.setTextSize(30);
        String text  = String.valueOf(mCount);
        mPaint.getTextBounds(text,0,text.length(),mBounds);
        float textWidth = mBounds.width();
        float textHeight = mBounds.height();
        canvas.drawText(text,getWidth()/2-textWidth/2,getHeight()/2+textHeight/2,mPaint);
    }

    @Override
    public void onClick(View v) {
        mCount++;
        invalidate();//invalidate()方法会导致视图进行重绘，因此onDraw()方法在稍后就将会得到调用
    }
}
